1//===-- MipsISelLowering.h - Mips DAG Lowering Interface --------*- C++ -*-===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9// 10// This file defines the interfaces that Mips uses to lower LLVM code into a 11// selection DAG. 12// 13//===----------------------------------------------------------------------===// 14 15#ifndef MipsISELLOWERING_H 16#define MipsISELLOWERING_H 17 18#include "llvm/CodeGen/SelectionDAG.h" 19#include "llvm/Target/TargetLowering.h" 20#include "Mips.h" 21#include "MipsSubtarget.h" 22 23namespace llvm { 24 namespace MipsISD { 25 enum NodeType { 26 // Start the numbering from where ISD NodeType finishes. 27 FIRST_NUMBER = ISD::BUILTIN_OP_END, 28 29 // Jump and link (call) 30 JmpLink, 31 32 // Get the Higher 16 bits from a 32-bit immediate 33 // No relation with Mips Hi register 34 Hi, 35 36 // Get the Lower 16 bits from a 32-bit immediate 37 // No relation with Mips Lo register 38 Lo, 39 40 // Handle gp_rel (small data/bss sections) relocation. 41 GPRel, 42 43 // Conditional Move 44 CMov, 45 46 // Select CC Pseudo Instruction 47 SelectCC, 48 49 // Floating Point Select CC Pseudo Instruction 50 FPSelectCC, 51 52 // Floating Point Branch Conditional 53 FPBrcond, 54 55 // Floating Point Compare 56 FPCmp, 57 58 // Floating Point Rounding 59 FPRound, 60 61 // Return 62 Ret 63 }; 64 } 65 66 //===--------------------------------------------------------------------===// 67 // TargetLowering Implementation 68 //===--------------------------------------------------------------------===// 69 class MipsTargetLowering : public TargetLowering 70 {
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71 // FrameIndex for return slot.
72 int ReturnAddrIndex;
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71 public: 72 73 explicit MipsTargetLowering(MipsTargetMachine &TM); 74 75 /// LowerOperation - Provide custom lowering hooks for some operations. 76 virtual SDValue LowerOperation(SDValue Op, SelectionDAG &DAG); 77 78 /// getTargetNodeName - This method returns the name of a target specific 79 // DAG node. 80 virtual const char *getTargetNodeName(unsigned Opcode) const; 81 82 /// getSetCCResultType - get the ISD::SETCC result ValueType 83 MVT getSetCCResultType(MVT VT) const; 84
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85 /// getFunctionAlignment - Return the Log2 alignment of this function. 86 virtual unsigned getFunctionAlignment(const Function *F) const; |
87 private: 88 // Subtarget Info 89 const MipsSubtarget *Subtarget; 90 91 // Lower Operand helpers 92 SDNode *LowerCallResult(SDValue Chain, SDValue InFlag, CallSDNode *TheCall, 93 unsigned CallingConv, SelectionDAG &DAG); 94 bool IsGlobalInSmallSection(GlobalValue *GV); 95 bool IsInSmallSection(unsigned Size); 96 97 // Lower Operand specifics 98 SDValue LowerANDOR(SDValue Op, SelectionDAG &DAG); 99 SDValue LowerBRCOND(SDValue Op, SelectionDAG &DAG); 100 SDValue LowerCALL(SDValue Op, SelectionDAG &DAG); 101 SDValue LowerConstantPool(SDValue Op, SelectionDAG &DAG); 102 SDValue LowerDYNAMIC_STACKALLOC(SDValue Op, SelectionDAG &DAG); 103 SDValue LowerFORMAL_ARGUMENTS(SDValue Op, SelectionDAG &DAG); 104 SDValue LowerFP_TO_SINT(SDValue Op, SelectionDAG &DAG); 105 SDValue LowerGlobalAddress(SDValue Op, SelectionDAG &DAG); 106 SDValue LowerGlobalTLSAddress(SDValue Op, SelectionDAG &DAG); 107 SDValue LowerJumpTable(SDValue Op, SelectionDAG &DAG); 108 SDValue LowerRET(SDValue Op, SelectionDAG &DAG); 109 SDValue LowerSELECT(SDValue Op, SelectionDAG &DAG); 110 SDValue LowerSETCC(SDValue Op, SelectionDAG &DAG); 111 112 virtual MachineBasicBlock *EmitInstrWithCustomInserter(MachineInstr *MI, 113 MachineBasicBlock *MBB) const; 114 115 // Inline asm support 116 ConstraintType getConstraintType(const std::string &Constraint) const; 117 118 std::pair<unsigned, const TargetRegisterClass*> 119 getRegForInlineAsmConstraint(const std::string &Constraint, 120 MVT VT) const; 121 122 std::vector<unsigned> 123 getRegClassForInlineAsmConstraint(const std::string &Constraint, 124 MVT VT) const; 125 126 virtual bool isOffsetFoldingLegal(const GlobalAddressSDNode *GA) const; 127 }; 128} 129 130#endif // MipsISELLOWERING_H
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